linux-kernel - [PATCH AUTOSEL 5.15 7/8] usb: gadget: aspeed: Add NULL pointer check in ast_vhub_init

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Message-Id: <20250407181516.3183864-7-sashal@kernel.org>
Date: Mon,  7 Apr 2025 14:15:13 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Chenyuan Yang <chenyuan0y@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>,
	joel@....id.au,
	andrew@...econstruct.com.au,
	richardcochran@...il.com,
	linux-usb@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-aspeed@...ts.ozlabs.org,
	netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 7/8] usb: gadget: aspeed: Add NULL pointer check in ast_vhub_init_dev()

From: Chenyuan Yang <chenyuan0y@...il.com>

[ Upstream commit 8c75f3e6a433d92084ad4e78b029ae680865420f ]

The variable d->name, returned by devm_kasprintf(), could be NULL.
A pointer check is added to prevent potential NULL pointer dereference.
This is similar to the fix in commit 3027e7b15b02
("ice: Fix some null pointer dereference issues in ice_ptp.c").

This issue is found by our static analysis tool

Signed-off-by: Chenyuan Yang <chenyuan0y@...il.com>
Link: https://lore.kernel.org/r/20250311012705.1233829-1-chenyuan0y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/gadget/udc/aspeed-vhub/dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index d918e8b2af3c2..c5f7123837751 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -538,6 +538,9 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx)
 	d->vhub = vhub;
 	d->index = idx;
 	d->name = devm_kasprintf(parent, GFP_KERNEL, "port%d", idx+1);
+	if (!d->name)
+		return -ENOMEM;
+
 	d->regs = vhub->regs + 0x100 + 0x10 * idx;
 
 	ast_vhub_init_ep0(vhub, &d->ep0, d);
-- 
2.39.5